A04 Barbarian - Imperial Organic Yeast

A04 Barbarian - Imperial Organic Yeast

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A04 Barbarian will attack your IPAs with esters of stone fruit when paired with citrus hops. Who doesn’t love that combo in their beer... tasty! For an exceptionally balanced IPA we highly recommend A04 Barbarian.

  • Temp: 62-70°F, 16-21°C
  • Flocculation: Medium
  • Attenuation: 73-74%
  • Cell Count: 200 Billion

White Labs Equivalent: N/A
Wyeast Equivalent: N/A

Usage Instructions:
  • ​Store refrigerated until ready to pitch
  • Shake and kneed pouch to homogenize slurry
  • Sanitize the sealed pouch
  • Open and pitch entire contents into well-aerated wort

Please Note: For best results we Always recommend ordering an Ice Pack with your liquid yeast. Ice Packs can be found below in the "You might Also Need" section.


Item # IYA04
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.37 LBS
Community Q&A

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Browse 1 question Browse 1 question and 43 answers
Why did you choose this?
MoreFlavor Store
Great yeast for Vermont style beers.
Jason H on Jan 12, 2021
something different
Rich B on Nov 17, 2020
Great yeast for Vermont style beers.
Jason H on Jan 12, 2021
Michael H on Dec 4, 2020
something different
Rich B on Nov 17, 2020
Superior yeast
Ed W on Oct 29, 2020
super peachy
maxwell blakely on Sep 28, 2020
Benjamin E A on Aug 4, 2020
you suggested it
Suzanne Anderson on Aug 4, 2020
Haven't tried this yeast before; curious about esthers it produces
Erica H on May 9, 2020
I wanted a ton of yeast cells, seeing as I have to ship everything now
Geoffrey N on Apr 29, 2020
Need Yeast
maxwell blakely on Apr 23, 2020
never used and like organic and the name :)
Ryan R on Mar 25, 2020
Heard good things about it
Seyed Mirhosseini on Mar 5, 2020
To make beer
Christopher Z on Jan 20, 2020
Love this yeast for attenuation
David D on Jan 16, 2020
I've not had great success with dry yeast or other yeast when shipped. very slow fermentation activity and early finishing. I've had two different shipments with Imperial yeast that have been great.
David H Slaton Jr. on Dec 11, 2019
heard good things about Imperial yeast
Valued C on Dec 6, 2019
Trying something new
Sven-anton S on Nov 19, 2019
I recently switched from White Labs to Imperial and my beers have improved 10 fold. Darkness took my Vanilla Porter from pretty good to outstanding
Skyzer M on Nov 12, 2019
Trying something new
Alexander W on Sep 16, 2019
love their yeast
Bruce F on Aug 28, 2019
Conan strain for the heady topper clone kit.
Lee B on Aug 28, 2019
My local homebrew shops do not carry it.
Chelsea G on Jul 23, 2019
making beer need yeast
John w on May 24, 2019
cause esters
Joshua J M on May 4, 2019
Conan, my man.
Kenneth M on Apr 25, 2019
something new
Dale Keesler on Mar 18, 2019
Mid coast IPA - looking for that stone fruit accent
Curtis Pastor on Mar 5, 2019
I like imperial yeast and seemed to the good for IPA
Henry F K on Feb 26, 2019
great reviews
David M on Feb 1, 2019
One of the best IPA yeasts I have ever used....
Mike I on Nov 22, 2018
Try a new batch
kris m on Nov 17, 2018
Love it
Jonathan M on Oct 1, 2018
love the yeast
Doug D on Sep 27, 2018
For my IPA
Andrew H on Jul 10, 2018
This was recommended by High Water Brewing as a key to the style I am going for
Robert Borsdorf on Jun 30, 2018
I'm out and need more.
David M C on Jun 11, 2018
Want to try this yeast as a second yeast addition for a Triple IPA.
william g on May 4, 2018
its good
Michael L Z on Apr 11, 2018
I like this strain for NEIPA
paris7588 on Mar 20, 2018
Awesome for New England IPA's
Michael J on Feb 28, 2018
Black IPA with Galaxy
Chris W on Feb 20, 2018
Wanted to try something different than previous batches
Jim H on Feb 20, 2018
works great
Paul E on Jan 24, 2018
Michael H on Dec 4, 2020
Superior yeast
Ed W on Oct 29, 2020

4.6 / 5.0
18 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Hear the Lamentations of your Wort
This is a beast of a yeast. Crazy activity leads to a quicky finished, clean beer. Clears like a champ!
January 5, 2021
8 months ago
Kicked off fast
Kicked off fast and that's what you want!
November 12, 2020
2 months ago
Arrived with good dates, in the fermenter now with a IPA, quick start, looking forward to keg day.
October 3, 2019
1 year ago
Started this yeast up 3/8 with 1.6 Liters of starter wort, and I brewed two IPA's on Saturday 3/9. The first one, I honestly was dead convinced that I fried the beta-amylase enzymes because after a protein rest dough-in, the temperature came up to 160F for at least 10 minutes, and though I cooled it down a bit after that, the remainder of the 60 minute sacch rest was definitely hotter than I usually mash. The recipe included

14.5# 2-Row
and .8#C60

The wort was almost candy after the boil; my hydrometer showed 1.088 OG in 5 gallons of wort, woah! I added a couple gallons of lower OG beta wort to take it to 1.070 0G

So I thought that given bad reviews on attenuation with this yeast, I'd have a cloying beer on my hands.

Today, 3/12 (Pitched on the 9th,) the gravity is already 1.013!

So, keep your enzymes ln check and this is awesome! :3
March 12, 2019
Response from MoreFlavor
Thank you so much for your feedback. We really appreciate the honesty and value great feedback like this as it helps us improve our products. Cheers!
March 13, 2019
Tyler W Staff
Great Strain for Juice Bomb IPA's
I've played with this strain's temp tolerances for several batches ranging from low 60's to low 70's and in every batch the fermentation takes off producing stone fruit aromas reminding of my Little Havana childhood drinking Libby's canned Peach Juice. The thing is a krausen volcano bubbling CO2. It even got my wife's attention due to all the noise it was making in my office. I prefer to ferment The Barbarian starting at 67F on the first day and ramping it up slowly to 72F over the course of a week. It will fully attenuate in 7 days and is ready for packaging at two weeks. The haze is epic if you heavily dry hop with this strain as you can see from my pic. I still haven't finished dry hopping it with the second addition and the haze is insane already.
Great strain and I appreciate Imperial Yeast Lab's 200 billion cell count packs. Thank you Imperial for making this strain available to home brewers and thanks to MoreBeer for selling it.
New England IPA brewed and dry hopped with Azacca and Mosaic hops. This is a fruit bomb.
New England IPA brewed and dry hopped with Azacca and Mosaic hops. This is a fruit bomb.
February 22, 2019
Response from MoreFlavor
Thank you so much for your feedback. We really appreciate the honesty and value great feedback like this as it helps us improve our products. Cheers!
February 25, 2019
Tyler W Staff
Great Yeast
So far I'm really impressed with Barbarian, and Imperial Yeast in general. I've used Barbarian 3 times now, and it may be my favorite yeast for hop forward beers - I plan on experimenting with it for other styles as well. 200B cells per package is nice.
August 24, 2018
over 2 years ago
Quality packaging, arrived quickly. Highly recommend purchasing the ice packs for shipping.
April 2, 2018
over 3 years ago
Excellent liquid yeast for New England Style India Pale Ales!!
March 21, 2018
over 2 years ago
Used on an IPA that started at 1.072 and this yeast plowed through it, taking it down to 1.015 within a week. Another week to let it clean things up and I have an IPA that is awesome!
March 16, 2018
over 2 years ago
Absolutely recommend it. Great juicy flavor in New England IPAs.
March 13, 2018
over 2 years ago